Book Image

From PHP to Ruby on Rails

By : Bernard Pineda
4 (1)
Book Image

From PHP to Ruby on Rails

4 (1)
By: Bernard Pineda

Overview of this book

Are you a PHP developer looking to take your first steps into the world of Ruby development? From PHP to Ruby on Rails will help you leverage your existing knowledge to gain expertise in Ruby on Rails. With a focus on bridging the gap between PHP and Ruby, this guide will help you develop the Ruby mindset, set up your local environment, grasp the syntax, master scripting, explore popular Ruby frameworks, and find out about libraries and gems. This book offers a unique take on Ruby from the perspective of a seasoned PHP developer who initially refused to learn other technologies, but never looked back after taking the leap. As such, it teaches with a language-agnostic approach that will help you feel at home in any programming language without learning everything from scratch. This approach will help you avoid common mistakes such as writing Ruby as if it were PHP and increase your understanding of the programming ecosystem as a whole. By the end of this book, you'll have gained a solid understanding of Ruby, its ecosystem, and how it compares to PHP, enabling you to build robust and scalable applications using Ruby on Rails.

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Table of Contents (15 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the example code files
Conventions used
Get in touch
Share Your Thoughts
Download a free PDF copy of this book
1
Part 1:From PHP to Ruby Basics
Part 1:From PHP to Ruby Basics
Free Chapter
2
Chapter 1: Understanding the Ruby Mindset and Culture
Chapter 1: Understanding the Ruby Mindset and Culture
Technical requirements
Ruby is meant to be read as sentences
Everything is an object
Transitioning to Ruby
Summary
3
Chapter 2: Setting Up Our Local Environment
Chapter 2: Setting Up Our Local Environment
Technical requirements
Installing Ruby locally
Using a virtual machine
Using Docker
Using rbenv
Summary
4
Chapter 3: Comparing Basic Ruby Syntax to PHP
Chapter 3: Comparing Basic Ruby Syntax to PHP
Technical requirements
Running Ruby code from the command line
Exploring types of variables
Using conditional statements
Repeating code with loops
Using Ruby language enhancements
Summary
5
Chapter 4: Ruby Scripting versus PHP Scripting
Chapter 4: Ruby Scripting versus PHP Scripting
Technical requirements
Beyond Hello World
Text handling
File manipulation
Command-line arguments
Putting it all together
Summary
6
Chapter 5: Libraries and Class Syntax
Chapter 5: Libraries and Class Syntax
Technical requirements
Let’s get ready to bundle!!!
Gemfile versus composer.json
Integrating libraries into your code in Ruby
Declaring classes in Ruby
Objects in Ruby
Inheritance in Ruby
Summary
7
Chapter 6: Debugging Ruby
Chapter 6: Debugging Ruby
Technical requirements
Debugging functions in Ruby versus PHP
Gems for debugging
Understanding IRB’s usefulness
Summary
8
Part 2:Ruby and the Web
Part 2:Ruby and the Web
9
Chapter 7: Understanding Convention over Configuration
Chapter 7: Understanding Convention over Configuration
Technical requirements
If there is Ruby magic, there is Rails magic
Rails file structure explained
MVC at its finest
POST, GET, and SESSION in Rails
Summary
10
Chapter 8: Models, DBs, and Active Record
Chapter 8: Models, DBs, and Active Record
Technical requirements
Generating models using Rails
Connecting to a database
Active Record operations
Summary
11
Chapter 9: Bringing It All Together
Chapter 9: Bringing It All Together
Technical requirements
Project preparation
Setting up our application
Processing data
Do not, I repeat, do not repeat yourself
Summary
12
Chapter 10: Considerations for Hosting Rails Applications versus PHP Applications
Chapter 10: Considerations for Hosting Rails Applications versus PHP Applications
Technical requirements
PHP versus Rails in terms of price
DIY or have it done for you
Why nginx?
Error gossip and last words
Summary
13
Index
Index
Why subscribe?
14
Other Books You May Enjoy
Other Books You May Enjoy
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Share Your Thoughts
Download a free PDF copy of this book

Connecting to a database

So far, we’ve created a Person model and the migrations needed for the structure of our database. Now we are ready to connect to our database. But wait, we’ve already connected to a database! As previously stated, if we were able to run our migration successfully, it means that we did indeed connect to the SQLite database. Now let’s take a look at how Rails is configured to do this. Let’s examine our Gemfile, and in doing so, we’ll see the following line:

…
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
…

The preceding line installs the sqlite3 gem that allows Rails to communicate with a SQLite database. But wait, there’s more. If we open the app/config/database.yml file, we will also see some of the database settings for our project:

…
default: &default
  adapter: sqlite3
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %&gt...
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